IANA has long exhausted its block assignments to regions, so the other regions have long been dealing with this. But now we in North America are going to start feeling it too.
News Link: http://teamarin.net/2015/09/24/arin-reaches-ipv4-depletion/
ARIN Link: https://www.arin.net/resources/request/ipv4_countdown.html
Prior IANA depletion (2011): https://www.nro.net/news/ipv4-free-pool-depleted
ARIN Link: https://www.arin.net/resources/request/ipv4_countdown.html
Prior IANA depletion (2011): https://www.nro.net/news/ipv4-free-pool-depleted